Checker Framework: 2.5.0 -> 2.5.1

2.5.1 includes a fix for
https://github.com/typetools/checker-framework/issues/1838.  This commit also
adds a few more @Nullable annotations that are required now.

1 files changed, 2 insertions, 2 deletions

diff --git a/impl_core/src/main/java/io/opencensus/implcore/stats/MutableViewData.java b/impl_core/src/main/java/io/opencensus/implcore/stats/MutableViewData.java
index f4136616..8e527dc6 100644
--- a/impl_core/src/main/java/io/opencensus/implcore/stats/MutableViewData.java
+++ b/impl_core/src/main/java/io/opencensus/implcore/stats/MutableViewData.java
@@ -227,7 +227,7 @@ abstract class MutableViewData {
         // If Stats state is DISABLED, return an empty ViewData.
         return ViewData.create(
             super.view,
-            Collections.<List<TagValue>, AggregationData>emptyMap(),
+            Collections.<List</*@Nullable*/ TagValue>, AggregationData>emptyMap(),
             ViewData.AggregationWindowData.CumulativeData.create(ZERO_TIMESTAMP, ZERO_TIMESTAMP));
       }
     }
@@ -320,7 +320,7 @@ abstract class MutableViewData {
         // If Stats state is DISABLED, return an empty ViewData.
         return ViewData.create(
             super.view,
-            Collections.<List<TagValue>, AggregationData>emptyMap(),
+            Collections.<List</*@Nullable*/ TagValue>, AggregationData>emptyMap(),
             ViewData.AggregationWindowData.IntervalData.create(ZERO_TIMESTAMP));
       }
     }